In each part, identify the orbital diagram as the ground state, the excited state, or an impossible

Question:

In each part, identify the orbital diagram as the ground state, the excited state, or an impossible state. If it is an excited state, give the ground-state diagram, and if it is an impossible state, explain why. (b) 15 (a) 14 (c) (d) 15 11 15 14 15 1 2s 14 25 14 2s 11 25 11 1 20 2p 11 20 111 2p 11 1 3s 11 p 1L 1L